Psychology professor Akiyoshi Kitaoka recently posted this optical illusion on his Facebook page, which then made it to Twitter and quickly went viral through a large number of shares and retweets. If you look at this pattern, you will be able to find 12 black dots. The problem is, most people are completely unable to view all 12 of them at the same time. If you look at the 4 dots at the top, you can’t seem to see the ones at the bottom. If you look at the four on the bottom, you can’t see the ones at the top. If you look at the ones in the middle, the dots at the top AND bottom seem to be gone.